Try this

.gitea/workflows/deploy.yml

@@ -0,0 +1,30 @@
+name: Deploy Hashel
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+        with:
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+
+      - name: Configure SSH
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan -H haschel >> ~/.ssh/known_hosts 2>/dev/null || true
+
+      - name: Deploy with deploy-rs
+        run: |
+          nix run github:serokell/deploy-rs -- .#haschel --skip-checks